A Multi Criteria Decision-Making for Improving Cooling Tower Reliability: An Application of Value-Focused Thinking and Analytical Hierarchy Process at PT KPI
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This study addressed the strategic need to improve cooling tower reliability at PT KPI, where an aging timber structure had experienced progressive deterioration due to prolonged exposure to moisture, chemical effects, biological degradation, and continuous operational loading. As the cooling tower supports cooling water circulation and power generation processes, its failure could disrupt refinery operations and result in significant operational and financial impacts. The purpose of this research was to determine the most appropriate maintenance and improvement strategy by integrating stakeholder expectations with technical, operational, financial, and implementation considerations. This study employed a mixed-method approach involving semi-structured interviews, questionnaires, field observations, document reviews, Value-Focused Thinking (VFT), the Analytic Hierarchy Process (AHP), and Cost–Benefit Analysis (CBA). The results showed that operational continuity was the most important criterion, followed by technical reliability, economic performance, implementation constraints, and maintainability. Three alternatives were evaluated: constructing a new reinforced concrete cooling tower, revitalizing the existing timber structure, and replacing structural components with a Fiber-Reinforced Polymer (FRP) system. The AHP synthesis identified timber revitalization as the most preferred alternative, with the highest global priority score and the strongest cost–benefit value. Sensitivity analysis confirmed that this ranking remained stable across all evaluated scenarios. The study concluded that phased timber revitalization was the most feasible strategy for enhancing cooling tower reliability while maintaining refinery operational continuity.
Gahrn-Andersen, R., & Festila, M. (2024). From reactive to proactive infrastructure maintenance: Remote sensing data and practical resilience in the management of leaky pipes. Systems, 12(10), Article 431. https://doi.org/10.3390/systems12100431
Huang, W., Chen, Y., Li, H., He, Z., Li, Z., Liu, B., & Wang, G. (2026). An equivalent model for cooling tower boundary conditions in industrial recirculating cooling water systems. Energies, 19(10), 2400.
Khan, M. A., West, S., & Wuest, T. (2020). Midlife upgrade of capital equipment: A servitization-enabled, value-adding alternative to traditional equipment replacement strategies. CIRP Journal of Manufacturing Science and Technology, 29, 232–244. https://doi.org/10.1016/j.cirpj.2019.09.001
Liu, T., Pang, H., He, S., Zhao, B., Zhang, Z., Wang, J., Liu, Z., Huang, X., Shi, Y., & Gao, M. (2023). Evaporative cooling applied in thermal power plants: A review of the state-of-the-art and typical case studies. Fluid Dynamics & Materials Processing, 19(9).
Mendis, M. S., Abeyrathna, W., Halwatura, R. U., Amarasekara, H. S., Somadewa, R., & Jayasinghe, R. (2024). Accumulate and consolidate the traditional vernacular timber preservation technologies through a field survey. Heliyon, 10(1), Article e23907. https://doi.org/10.1016/j.heliyon.2023.e23907
More, F., Fabbrocino, G., & Sandoli, A. (2026). Structural health monitoring of timber structures: Methods, sensors and real-world applications. Procedia Structural Integrity, 78, 944–951. https://doi.org/10.1016/j.prostr.2025.12.121
Mukhyi, M. A. (2022). Analysis of the area of South Sumatra industry growth centers. Eduvest-Journal of Universal Studies, 2(6), 1134–1141.
Nakazato, Y., Mizutani, D., & Fukuyama, S. (2023). Optimal repair policies for infrastructure systems with life cycle cost minimization and annual cost leveling. Journal of Infrastructure Systems, 29(3), Article 04023019. https://doi.org/10.1061/JITSE4.ISENG-2169
Nurcahyono, E., & Prawiraatmadja, W. (2025). Business strategies for the most complex Indonesian oil refinery. Jurnal Sosial dan Sains, 5(1), 122–131.
Plata, S. L., Devenport, C. L., Miara, A., Sitterley, K. A., Evans, A., Talmadge, M., Van Allsburg, K. M., Kurup, P., Cox, J., & Kerber, S. (2022). Zero liquid discharge and water reuse in recirculating cooling towers at power facilities: Review and case study analysis. ACS ES&T Engineering, 2(3), 508–525. https://doi.org/10.1021/acsestengg.1c00436
Sánchez-Garrido, A. J., Navarro, I. J., & Yepes, V. (2022). Multi-criteria decision-making applied to the sustainability of building structures based on modern methods of construction. Journal of Cleaner Production, 330, Article 129724. https://doi.org/10.1016/j.jclepro.2021.129724
Septian, A. (2026). Investment project analysis of PT ABC external power electricity interconnection with utilities power generation system PT Kilang PT XYZ Internasional Refinery Unit III Plaju. Eduvest-Journal of Universal Studies, 6(5), 6253–6271.
Shirmohammadi, M., Leggate, W., & Redman, A. (2021). Effects of moisture ingress and egress on the performance and service life of mass timber products in buildings: A review. Construction and Building Materials, 290, Article 123176. https://doi.org/10.1016/j.conbuildmat.2021.123176
Uwizeyimana, P., Perrin, M., Laügt, E., & Eyma, F. (2021). Durability study of glulam timber under cyclic moisture loading. Construction and Building Materials, 315, Article 125715. https://doi.org/10.1016/j.conbuildmat.2021.125715
van den Boomen, M., Spaan, M. T. J., Shang, Y., & Wolfert, A. R. M. (2020). Infrastructure maintenance and replacement optimization under multiple uncertainties and managerial flexibility. Construction Management and Economics, 38(1), 91–107. https://doi.org/10.1080/01446193.2019.1674450
Wang, H., Qiu, B., Zhao, F., & Yan, T. (2023). Method for increasing net power of power plant based on operation optimization of circulating cooling water system. Energy, 282, 128392.
Wang, M.-H. S., & Wang, L. K. (2026). Cooling tower and boiler water treatment. In Industrial Water and Waste Treatment (pp. 349–375). CRC Press.
Werbinska-Wojciechowska, S., & Rogowski, R. (2025). Proactive maintenance of pump systems operating in the mining industry—A systematic review. Sensors, 25(8), Article 2365. https://doi.org/10.3390/s25082365
Wibowo, A., & Hermawan, P. (2026). Strategic decision making for facility optimisation in Indonesia's Gunung Kemala oil field using AHP. Hasanuddin Economics and Business Review, 236–263.
